HydroBASINS lev08 watershed · #1081571360
Bassin de Oanob
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 5 administrative regions : Mariental Rural, Rehoboth East, Rehoboth Rural, Rehoboth West, Windhoek Rural
Sub-basin area
1 520,7km²
Upstream area
6 251,8km²
Discharge
1,39m³/s
Mean elev.
1 375m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Usib882 km²
- Bassin de Swartmodder312 km²
5 dept-equivalent regions (GADM L2)
- 1281.7 km²84.5% of basin
- 156.2 km²10.3% of basin
- 42.9 km²2.8% of basin
- 27.5 km²1.8% of basin
- 8.8 km²0.6% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
265 distinct species · 1 219 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Oanob : 11 espèces reliées par 17 interactions GloBI sur 3 types (connectance 11.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
19,5°C
Annual rain
260mm
Moisture idx (CMI)
-0,85
Runoff
6mm/an
PET
1 790mm
AET
217mm
Mean slope
0,6°
Water table
281cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)